Wastewater Pipe Rehabilitation Project

This project involves the trenchless rehabilitation of approximately 5,150 linear feet of a 60-inch reinforced concrete pipe (RCP) gravity wastewater pipe, which dates back to the 1950s. The scope of work includes replacing, reconstructing, and rehabilitating existing steel-reinforced concrete manhole structures. The rehabilitation will primarily utilize a Machine Spiral Wound Liner (MSWL) for approximately 4,790 linear feet and CIPP followed by HDPE slip lining for the approximately 360 linear feet that cross the Trinity River. Flow control during rehabilitation will be managed through the diversion of flow using the upstream DWU Sunbeam Diversion Structure, in accordance with the specified Flow Control Provisions. The pipeline rehabilitation extents are defined from the west side of the East Branch of the Trinity River eastward to the vicinity of the existing Rochester Stormwater Pump Station (SWPS), located near William Blair Jr. Park in South Dallas. The project area traverses an Oncor High Voltage Transmission Tower Right-of-Way (ROW), an active Union Pacific Railroad (UPRR) ROW, and a Texas Department of Transportation (TXDOT) ROW. Furthermore, the entire pipeline alignment is situated within the FEMA Regulatory Floodway, making the area subject to flooding. Portions of the existing pipeline and project area also fall within the United States Army Corps of Engineers (USACE) Lamar Levee Extension Project Area and run parallel to the Rochester Levee, both of which are under USACE jurisdiction.